Gas turbine-engine.



H. LENTZ.

GAS TURBINE ENGINE. APPLICATION FILED MAR. 31, 1905.

W J J lllli iiimy...

1 ill hr UNITED s'rATas PATENT OFFICE.

HUGO LENTZ, 0F BERLIN, GERMANY.

GAS TURBINE-ENGINE.

T 0 all wlwm it may concern:

Be it known that I, HUGO Lny'rz, subject of the German Emperor, residing at 10-11 Potsdamerstrasse, Berlin, Germany, engineer, have invented .a newand useful Imrovement in Gas Turbine-Engines; and I do ereby declare the following to be a full, clear, and exact description of the same.

This invention relates to turbine-e1 'ines operated by explosions of gas mixed vn't air or other medium, and the special object thereof is to combine in one entity or machine two turbine wheels running in o posite directions and a compressor operated \y one of said turbines and which is employed to compress the air supplied with the gas ignited to drive the two turbine wheels.

Prior to my present invention, gas turbineengines, as well as piston engines operated by gas-explosions, have usually been provided with an auxiliary compressor-mechanism for the purpose of compressing the air, gas, or other medium before ignition of the charge. In contradistinction to said structures, my invention com rises means whereby the compressor-mec anism forms a part of the turbine-engine itself, and is so arranged with respect to the main shaft, or shaft giving the princi al working effect, and connections, that t e compressor-mechanism will be operated by the pressure-medium after it has acted upon the turbine-wheel or turbinewheels connected with said' main shaft. It will thus be seen that I utilize the pressuremedium, after its use for ower purposes, as the means for effecting t e compression of air or as or both, and, the air or gas so comresse is utilized, when ignited or com ined with the ignited charge, to' drive the same turbine-engine with which the com- Presser-mechanism is combined.

In the carrying out of my invention, I employ not only the turbine-wheels which drive the power-shaft, but also a supplementary or additional turbine-wheel, driven by the pressure-medium, after leaving the main turbine-wheel or turbine-wheels, and also connected compressor-mechanism. The form employed by me, viz., having two shafts running in opposite directions, may be' like that utilized in the Seger turbine (see, for instance, pages 225-227, of Lowensteins translation of the second edition of Steam Turbines, by Stodola), the two turbinewheels being, however, employed by me to operate two different mechanisms.

Specification 0! Letters Patent.

Application filod'llrch 31. 1905. Serial No. 358,1.

hmted Feb, 9, woe.

It is, of course, within the scope of my invention to secure a plurality of rotating wheels, which may be spaced apart by suitable guide-wheel systems (as in the Curt-is type-l, upon either or both of the oppositely rotating shafts.

Referring to the accom anying drawings, Figure 1 is a side view, s towing a dynamo and a compressor and, between these, a turwheel, i. a, the wheel of smaller pews? effect; (1 represents a. nozzle, of which the may be any number, for directing the pressure-medium against the blades of wheel a; 0 represents a compressor, which may be of anv suitable construction, and comprising a shaft, f, driven by the wheel I); 9 represents a suitable machine, a dynamo being shown as directly connected with a shaft, e, driven by the wheel (1 Any other suitable form of machine, and driven directly, or by a belt, rope, or otherwise, may be used instead of the d name.

The blades of the w eels a and b are oppositely arranged, and, as a result, said wheels will tend to be driven in opposite directions, as indicated by the arrows in l have shown the compressor-mechanism connected with the wheel I), and have shown a dynamo connected with the wheel .a. The compressor may compress the gas, or the air, or both, and the compressed medium is led off, for effecting the operation of the wheel or wheels a; for instance, the compressed air may be led, by suitable regulating devices, into an ante-chamber near the wheel a, and u on ignition of the gas the air will be expan ed and expelled through the nozzle, d, directing it a ainst the blades of wheel a, which in turn efiect the pressuremedium against the oppositely arranged blades of wheel I).

It is obvious that, in my improved turbineengine, the compressor mechanism, corresponding to the auxiliary engine usually employed, formsa practical unit with the tur ine; also that the working action takes place at one side only, as distinguished from the Riedler-Stump f turbine (described in namos giving an even efiect on Biedlers lecture on steam-turbines, and illustrated in Fig. 41, page 56, of the published account thereof) which 0 erates dyand from the Seger turbine (described and shown in the Lowenstein translation, hereinbefore mentioned, at pages 225-227) wherein a single working shaft is connected, by a single belt with different sizesof pulleys on both turbine-shafts.

The work of compression of air and gas can be carriedon separately orsimultaneously. In considering the apparatus of Fig. 1-, it is assumed, for simplicity, that the air and gas are compressed by c simul-.,

taneously, and that the compressed mixture passes from thence to the combustionchamber, and from the latter. to the turbine roper. However, the air and .fuel, which atter maybe in liquid or atomized form, and may be injected into the combustion chamber, may be conveyed in any desired pressure medium,

0th s des formed in said casing,

- two subscribing witnesses.

a nozzle leading from said chamber for supplying pressure-medium to the wheels, a machine shaft connected to the primary turbine-wheel, a machine shaft driven independently of that first-named and connected to the secondary turbine-wheel, a compressor mechanism operated by the second-named shaft, and connections for leading com ressed air from said compressor to the com ustion-chamber aforesaid.

2; A motor comprising a primary turbinewheel and a secondary turbine-wheel within the same casing and arranged to be driven independently and in op osite directions by pressure-medium, a com ustion-chamber a nozzle leading from said chamber for supplying pressure-medium to the primary turbine wheel, a machine shaft connected to the primary turbine- Wheel, and a machine shaft driven independently of that first-named and connected to the secondary turbine-wheel.

In testimony whereof, name to this specification in the presence of HUGO LENTZ.

Witnessesz KARL H. MERE,

Lnnwre Lron'rnnsrnmnn.

I have signed my 

